1 files changed, 1 insertions, 0 deletions
diff --git a/math.cginc b/math.cginc
index d7656e1..636232d 100644
--- a/math.cginc
+++ b/math.cginc
@@ -5,6 +5,7 @@
 
 #define PI 3.14159265
 #define TAU PI * 2.0
+#define PHI 1.618033989
 
 // Hacky parameterizable whiteout blending. Probably some big mistakes but it
 // passes the eyeball test.